Propeller.



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OLINTON H. WESTON, OF LA OROSSE, WISCONSIN.

PROPELLER.

Specification of Letters Patent.

Patented .April 6, 1909.

Application filed November 5, 1908. Serial No. 461,165.

To all whom it may concern:

Be it known that I, CLIN'roN H. WEsToN, citizen of the United States,residing at La Crosse, in the county of La Crosse and State ofVVisconsin, have invented certain new and useful Tmprovements inPropellers, of which the following is a specification.

The present invention relates to improvements in marine propellers, andhas for its primary object to provide a device of this characterembodying a novel construction whereby it Will operate upon the Watermost effectively and enable the greatest amount of propelling force tobe obtained from the energy of the shaft.

The invention further' contemplates a propeller which is strong anddurable in its construction, and which is symmetrical in shape so thatit can be readily reversed or caused to operate in either direction, asdesired.

Td ith this and other objects in view, as will more fully appear, as thedescription proceeds, the invention consists in certain constructions,arrangements and combinations of the parts that I shall hereinafterfully describe and claim.

For a full understanding of the invention, reference is to be had to thefollowing` description and accompanying drawing in which the figure is aside elevation of a propeller constructed in accordance With myinvention.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingsby the same reference characters.

Referring to the drawings, the numeral 1 designates a shaft which mayreceive power from any suitable source and has a pair of spaced hubs 2rigidly mounted thereon, the pro peller blades 3 being carried by thesehubs and being coiled about the shaft, each of the blades making onecomplete revolution. In the present instance, two of these blades areutilized, and the said blades are so arranged that corresponding`portions thereof are always upon directly opposite sides of the shaft.It will, however, be observed, that the outer edges of both of theblades lie in the surface of an imaginary sphere surrounding l thepropeller, the said blades having a helicoidal formation. The Width ofthe blades at the middle portion thereof, is greater than the width atthe extremities, and, in the preferred construction, this middle Widthis substantially twice the width of the ends where the blades areattached to the hub. With this proportion, the space between the inneredges of the middle portion of the blades is substantially equal to thespace between the outer edges of the end portions of the blades so thatthe propeller acts upon all of the water within an area equal to thatinclosed by a great circle of the before mentioned imaginary sphere.

It will thus be obvious that the propeller has a symmetrical formation,both ends thereof being of the same shape so that it can be readilyreversed to operate in either direction as desired.

Having thus described the invention what is claimed as new is:

A marine propeller comprising a shaft, hubs upon the shaft, and a pairof blades coiled spirally about the shaft and having the ends thereofconnected to the hubs, the outer edges of both of the blades lying in animaginary Sphere, and surrounding the propeller and each blade making acomplete revolution about the shaft, the space between the inner edgesof the blades at the middle of the propeller corresponding to thedistance between the outer edges of the blades at the end portions ofthe pro eller so that the two blades will act effectivdly upon all ofthe water within an area equal to that inclosed by a great circle of thebefore mentioned sphere.

In testimony whereof I afflX my signature in presence of two witnesses.

CLINTON H. WTESTON.

Witnesses:

F. WINTER, J oHN J. Eson.

